US Patent: 3,120,959
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| Unitized Face Type Rotary Seal
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Patentees:
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| Hans Jensen (exact or similar names) - River Forest, Cook County, IL |
| Raymond H. Andresen (exact or similar names) - Barrington, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 27, 1961 |
| Granted: |
Feb. 11, 1964 |
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Joel Havens
"Vintage Machinery" entry for Gits Bros. Mfg. Co.
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Description: |
| Claim:
A rotary seal for sealing a shaft extending through an opening in a stationary member comprising a diaphragm member formed of an integral resilient material with a collar having. an inner cylindrical surface for frictionally holding the member on a shaft, with a radially extending diaphragm supported outwardly of the collar, and with an annular sealing bead at the outer edge of the diaphragm having an axially forwardly facing rounded sealing nose, said diaphragm joining the bead intermediate its axial extremities, an outer shell surrounding the diaphragm and having an outer annular flange to be press fit into an opening in a housing and a radial flange at the forward end having an axially rearwardly facing annular sealing face in sealing engagement with said bead, said radial flange having axially forwardly extending annular reinforcing ridges positioned at the radially inner and outer edges of the sealing face, an inwardly extending retaining flange at the rear end of the outer shell, said diaphragm having a normal unstressed position extending in a forward direction so that the head will be resiliently pushed forwardly toward the sealing face by the diaphragm, an inner shell surrounding said collar for clamping the collar inwardly against a shaft and having an outwardly extending holding flange for engaging the forward surface of the retaining flange of the outer shell, a ferrule having a radial annular flange positioned behind said bead and a forwardly extending flange radially outside holding said bead radially inwardly so that said bead will not pivot about its support and will not circumferentially expand, and an annular wave spring between said ferrule and the holding flange of the inner shell. A rotary seal member for mount ng on a rotating shaft element and for being spring urged into sealing engagement with an annular radial sealing surface, said member comprising a resilient annular mounting collar for supporting the member on said shaft element, a resilient annular flexible diaphragm member projecting substantially radially outwardly from the collar and integral therewith at its inner edge and pivoting in an axial direction substantially about its inner edge, an annular resilient sealing head at the outer edge of the diaphragm member and integral therewith axially movable into sealing engagement with the annular radial sealing surface, said bead having a rounded sealing nose with a radius and having a cylindrical inner surface and a radial rear surface, said diaphragm member secured to said inner surface between the ends thereof for supporting the sealing bead with a minimum of distortion and angular tilting with axial movement thereof and pivotal movement of the diaphragm member, and a rigid ring having a radial face engaging said rear surface and an annular face engaging the outer surface of the bead preventing it from expanding circumferentially outwardly.
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